13845005 has 4 divisors (see below), whose sum is σ = 16614012. Its totient is φ = 11076000.

The previous prime is 13845001. The next prime is 13845019. The reversal of 13845005 is 50054831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2427364 + 11417641 = 1558^2 + 3379^2 .

It is not a de Polignac number, because 13845005 - 2² = 13845001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13845001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384496 + ... + 1384505.

It is an arithmetic number, because the mean of its divisors is an integer number (4153503).

Almost surely, 2^13845005 is an apocalyptic number.

It is an amenable number.

13845005 is a deficient number, since it is larger than the sum of its proper divisors (2769007).

13845005 is an equidigital number, since it uses as much as digits as its factorization.

13845005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769006.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 13845005 is about 3720.8876629106. The cubic root of 13845005 is about 240.1214951981.

Adding to 13845005 its reverse (50054831), we get a palindrome (63899836).

The spelling of 13845005 in words is "thirteen million, eight hundred forty-five thousand, five".